Two projects to put pipes in the ground – some delivering, some removing – will not require additional conservation commission review.

Installation of new 8- and 12-inch sewer mains along Route 28 in Hyannis and water main upgrades for South Street, Lewis Bay, Yarmouth and Maher roads were advanced under the American Recovery and Reinvestment Act (ARRA), and will need to be under contract by Jan. 17.

Projects have already been bid to meet the tight schedule required to qualify for stimulus funds.

The sewer main project presented to the conservation commission is part of a larger project to accommodate the planned sewer pump station to be located on school-owned property at Hyannis West Elementary. The school committee gave its approval for placement of a new pump station at its Dec. 15 meeting.

The sewer work would start in the spring, delay in the summer and resume in the fall. It is anticipated that the work will be done at night to keep traffic impacts to a minimum.

The water main work will proceed on a similar schedule. In addition to the water work, electrical conduits will be installed in the event the town wants to bury power lines along those roads at some future date.

As ARRA qualified projects, the work will benefit from low interest loans and a 14 percent loan subsidy.